قال عثمان إن في القران لحناً وستقيمه العرب بألسنتها
الدر المنثور للسيوطي النساء ١٦٢
Uthman said: “For sure there are mistakes in the Quran, but the Arabs will fix them with their tongues.”
Scattered Pearls [Al-durr Al-manthour] by Al-Suyuti, commentary on Quran 4:162